Supplement Ratings

iHerb picks

Best Amino Acids on iHerb

Skip hours of label reading. Every pick below is sold on iHerb and passed our label check with 60+ points, so whatever you choose is worth taking, and you see today's price before you click.

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AllAmino AcidsAntioxidants & LongevityAshwagandha & AdaptogensB VitaminsBiotinBlood Sugar SupportBrain & NootropicsCalciumCollagenCoQ10CreatineDigestive HealthEye HealthGreens & SuperfoodsHeart HealthHerbs & BotanicalsHormone & Sexual HealthImmune SupportIronJoint SupportLiver & DetoxMagnesiumMelatonin & SleepMinerals & ElectrolytesMultivitaminsMushroomsOmega-3 & Fish OilPre-WorkoutProbioticsProtein SupplementsTurmeric & CurcuminUrinary HealthVitamin CVitamin DVitamins A, E & KWeight ManagementZinc
Top ratedBest value

Highest score first

673L-Tryptophan 1,000 mg62/100Source NaturalsL-Tryptophan 1,000 mgtablet · 45 servings · $0.82/servingBuy on iHerb · $36.73
674L-Lysine 500 mg62/100Mason NaturalL-Lysine 500 mgtablet · 100 servings · $0.06/servingBuy on iHerb · $5.85
675Intra Pink Lemonade62/100Nutricost PerformanceIntra Pink Lemonadepowder · 30 servings · $0.86/servingBuy on iHerb · $25.95
676Intra Blue Raspberry62/100Nutricost PerformanceIntra Blue Raspberrypowder · 30 servings · $0.74/servingBuy on iHerb · $22.06
6775-HTP 100 mg Wild Berry Flavor62/100Natrol5-HTP 100 mg Wild Berry Flavortablet · 30 servings · $0.55/servingBuy on iHerb · $16.37
678L-Phenylalanine62/100Source NaturalsL-Phenylalaninetablet · 50 servings · $0.19/servingBuy on iHerb · $9.38
679Acetyl L-Carnitine & Alpha-Lipoic Acid 650 mg61/100Source NaturalsAcetyl L-Carnitine & Alpha-Lipoic Acid 650 mgtablet · 30 servings · $0.82/servingBuy on iHerb · $24.53
6805-HTP 200 mg Time Release61/100Natrol5-HTP 200 mg Time Releasetablet · 30 servings · $0.72/servingBuy on iHerb · $21.66
6815-HTP 100 mg61/100Natrol5-HTP 100 mgtablet · 45 servings · $0.40/servingBuy on iHerb · $17.84
6825-HTP 100 mg Time Release61/100Natrol5-HTP 100 mg Time Releasetablet · 45 servings · $0.40/servingBuy on iHerb · $17.84
683N-Acetyl Cysteine 1,000 mg61/100Source NaturalsN-Acetyl Cysteine 1,000 mgtablet · 30 servings · $0.48/servingBuy on iHerb · $14.43
684Amino Acid Complex 100061/100KALAmino Acid Complex 1000tablet · 100 servings · $0.28/servingBuy on iHerb · $27.80
685DMG Liquid Natural Raspberry Flavoring61/100KirkmanDMG Liquid Natural Raspberry Flavoringliquid · 94 servings · $0.38/servingBuy on iHerb · $36.00
686AMINOCORE BCAA Blue Raspberry61/100ALLMAXAMINOCORE BCAA Blue Raspberrypowder · 30 servings · $0.67/servingBuy on iHerb · $20.20
687AMINOCORE BCAA Fruit Punch61/100ALLMAXAMINOCORE BCAA Fruit Punchpowder · 30 servings · $0.70/servingBuy on iHerb · $20.99
688AMINOCORE BCAA Pineapple Mango61/100ALLMAXAMINOCORE BCAA Pineapple Mangopowder · 30 servings · $0.77/servingBuy on iHerb · $23.16
689N-Acetyl Cysteine61/100Source NaturalsN-Acetyl Cysteinetablet · 120 servings · $0.22/servingBuy on iHerb · $25.84
690BCAA 6 g Stawberry Kiwi61/100Nutricost PerformanceBCAA 6 g Stawberry Kiwipowder · 90 servings · $0.44/servingBuy on iHerb · $39.95
691Pharma GABA61/100Natural Factors Stress-RelaxPharma GABAtablet · 30 servings · $0.79/servingBuy on iHerb · $23.78
6925-HTP Time Release 100 mg61/100Natrol5-HTP Time Release 100 mgtablet · 45 servings · $0.40/servingBuy on iHerb · $17.84
693Pharma GABA Fast Acting61/100Natural Factors Stress-RelaxPharma GABA Fast Actingtablet · 30 servings · $0.79/servingBuy on iHerb · $23.78
694HGH Surge60/100Source NaturalsHGH Surgetablet · 30 servings · $1.01/servingBuy on iHerb · $30.20
695L-Theanine Chewables 200 mg Natural Lemon Lime Flavor60/100SolarayL-Theanine Chewables 200 mg Natural Lemon Lime Flavorchewable · 30 servings · $0.69/servingBuy on iHerb · $20.69

Scores rate what's on the label (dosage transparency, cleanliness, ingredient profile), not clinical results. Prices come from the iHerb catalog feed and can change at checkout. See the full Best Amino Acids ranking.